. Botany for high schools and colleges. Botany. THE EPIDERMAL SYSTEM. 95 128—Tricliomes. Under this term are to be included the outgrowths which arise from the epidermis ; they may have the form of hairs, scales, glands, bristles, prickles, etc., and may be composed of single cells, or of masses of cells. They originate mostly from the growth of single epidermal cells,* and on their first appearance consist of slightly en-. Fio. 81. Fio. 80. Pig. 80.—Transverse section of epidermis and underlying tissue of ovary of Cu- ewmta. o, hair of a row of cells ; j and <*, glandular hairs of differen
. Botany for high schools and colleges. Botany. THE EPIDERMAL SYSTEM. 95 128—Tricliomes. Under this term are to be included the outgrowths which arise from the epidermis ; they may have the form of hairs, scales, glands, bristles, prickles, etc., and may be composed of single cells, or of masses of cells. They originate mostly from the growth of single epidermal cells,* and on their first appearance consist of slightly en-. Fio. 81. Fio. 80. Pig. 80.—Transverse section of epidermis and underlying tissue of ovary of Cu- ewmta. o, hair of a row of cells ; j and <*, glandular hairs of different ages; «,/, c, hairs in the youngest stages of their development. X 100.—After Prantl, Fig. 81.—A seedling mustard plant with its single root clothed with root-hairs; the newest (lowermost) portion of the root is not yet provided with root-hairs. larged and protruding cells (Fig. 80, e, f, c). These may elongate and form single-celled hairs, which may be simple or variously branched. The most important of these hairs are those which clothe so abundantly the young roots of most of the higher plants, end to which the name of Koot-hairs * It is probable that the common statement that trichomes always develop from single cells must be Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Bessey, Charles E. (Charles Edwin), 1845-1915. New York : H. Holt
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